| Houghton Regis to Amelia | 884.24 mi (1,423.04 km) |
| Houghton Regis to Anagni | 951.59 mi (1,531.44 km) |
| Houghton Regis to Ancona | 865.20 mi (1,392.40 km) |
| Houghton Regis to Andria | 1,083.36 mi (1,743.49 km) |
| Houghton Regis to Angri | 1,051.51 mi (1,692.25 km) |
| Houghton Regis to Anguillara Sabazia | 905.01 mi (1,456.47 km) |
| Houghton Regis to Anzio | 951.40 mi (1,531.13 km) |
| Houghton Regis to Anzola dell'Emilia | 739.56 mi (1,190.20 km) |
| Houghton Regis to Aosta | 555.26 mi (893.61 km) |
| Houghton Regis to Apricena | 1,025.18 mi (1,649.87 km) |
| Houghton Regis to Aprilia | 944.49 mi (1,520.01 km) |
| Houghton Regis to Aradeo | 1,203.00 mi (1,936.05 km) |
| Houghton Regis to Aragona | 1,214.84 mi (1,955.09 km) |
| Houghton Regis to Arco | 661.66 mi (1,064.83 km) |
| Houghton Regis to Arcola | 720.86 mi (1,160.12 km) |
